DOCUMENT DEPOSIT SYSTEM USING OFF-CHAIN DISTRIBUTED STORAGE BASED ON BLOCK CHAIN

摘要

According to an embodiment of the present invention, a document deposit system using an off-chain distributed storage based on a block chain comprises: an electronic document conversion unit to encode or decode file name, issue time, and issuer information of a first electronic document with a hash value encoded with a public key of a user if original registration of the first electronic document is requested from a web application installed in a user terminal; an electronic suitability determining unit to analyze similarity of a noun sequence between the first electronic document and previously registered electronic documents to determine document registration suitability; a transaction registration unit to register a hash value of the first electronic document and a public key used in the hash value in a block chain node if document registration suitability of the first electronic document is determined from the transaction registration unit; an original verification unit to convert file name, issue time, and issuer information of a third electronic document to be verified into a hash value encoded with the public key of the user if original verification between the third electronic document provided from the web application installed in the user terminal and the first electronic document is requested, then verify identicalness between the hash value of the third electronic document and the hash value of the first electronic document registered in the block chain node, and then track a time at which the first electronic document is deposited to issue a deposit certificate verifying an order relationship to the third electronic document; and a distributed storage to distribute and store the hash value encoding the file name, issue time, and issuer information of the first electronic document converted by the electronic document conversion unit with the public key of the user.;COPYRIGHT KIPO 2019